<template>
  <view>
    <!-- 搜索 -->
    <search />
    <!-- 分类 -->
    <view class="category">
      <!-- 顶级分类 -->
      <view class="sup">
        <scroll-view scroll-y>
          <text @click="switchCate(i)" :key="sup.cat_id" v-for="(sup,i) in cates" :class="i===0? 'active':''">{{sup.cat_name}}</text>
        </scroll-view>
      </view>
      <!-- 子级分类 -->
      <view class="sub">
        <scroll-view scroll-y>
          <!-- 封面图 -->
          <image src="http://static.botue.com/ugo/uploads/category.png" class="thumb" />
            <!-- 二级和三级分类遍历 -->
          <view class="children" v-for="sub in subs" :key="sub.cat_id">
            <!-- 二级 -->
            <view class="title">{{sub.cat_name}}</view>
            <!-- 品牌 -->
            <!-- 三级 -->
            <view class="brands">
              <navigator v-for="thd in sub.children" :key="thd.cat_id" :url="'/packone/list/index?query='+thd.cat_name">
                <image :src="thd.cat_icon" />
                <text>{{thd.cat_name}}</text>
              </navigator>
            </view>
          </view>
        </scroll-view>
      </view>
    </view>
  </view>
</template>

<script>
import search from "@/components/search/index";

export default {
  components: {
    search
  },
  data(){
    return{
      // 一级分类
      cates:[],
      // 当前选中的一级分类索引
      active:0
    }
  },
  // 计算属性 
  computed :{
  //  当前二级和三级分类数据
   subs () {
    return this.cates.length && this.cates[this.active].children
   }
  },
  onLoad (){
  this.getCates()
  },
  methods: {
    switchCate(i){
     console.log(i);
    },
    // 获取分类数据
   async getCates() {
      const {msg,data} =await this.request({url:'/categories'})
      console.info(msg,data);
      if(msg.status===200){
      this.cates=data
      }
    }
  }
};
</script>

<style scoped lang="scss">
scroll-view {
  height: 100%;
}

.category {
  display: flex;
  width: 100%;
  position: absolute;
  top: 100rpx;
  bottom: 0;

  .sup {
    width: 196rpx;
    background-color: #f4f4f4;

    text {
      display: block;
      height: 100rpx;
      text-align: center;
      line-height: 100rpx;
      font-size: 27rpx;
      color: #333;
      border-bottom: 1rpx solid #eee;

      &:last-child {
        border-bottom: none;
      }

      &.active {
        background-color: #fff;
        color: #ea4451;
        position: relative;

        &::before {
          content: "";
          display: block;
          width: 8rpx;
          height: 60rpx;
          transform: translateY(-50%);
          background-color: #ea4451;

          position: absolute;
          left: 0;
          top: 50%;
        }
      }
    }
  }

  .sub {
    flex: 1;
    padding: 20rpx 18rpx;

    .thumb {
      width: 100%;
      height: 180rpx;
    }

    .children {
      text-align: center;
      color: #333;

      .title {
        display: inline-block;
        margin: 40rpx 0 20rpx;
        font-size: 30rpx;

        &::before {
          content: "/";
          margin-right: 20rpx;
          color: #666;
        }

        &::after {
          content: "/";
          margin-left: 20rpx;
          color: #666;
        }
      }
    }

    .brands {
      display: flex;
      flex-wrap: wrap;

      navigator {
        width: 33%;
        margin-bottom: 20rpx;
      }

      image {
        width: 120rpx;
        height: 120rpx;
      }

      text {
        display: block;
        font-size: 24rpx;
      }
    }
  }
}
</style>
